Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce24ae47e48d379…

MALICIOUS

PDF

77.0 KB Created: 2021-04-28 18:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cca2ecfd5a17b9b8f02a98788e34ebd SHA-1: 9a0781a40c8db3c46afbe90814096fa58c7e5d1b SHA-256: 0ce24ae47e48d3790c71a03d8ced1124487889e2855e1ce08e123bbbd4a482b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'kuzutuzo.ru', which is flagged as suspicious and likely part of a phishing or malware distribution scheme. The PDF structure and embedded content suggest it's designed to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/strik?utm_term=an+enemy+called+average+by+john+mason
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • https://cdn-cms.f-static.net/uploads/4480382/normal_6020b6999f524.pdf
    • https://cdn-cms.f-static.net/uploads/4452846/normal_6045fbb7be0e6.pdf
    • https://cdn-cms.f-static.net/uploads/4413016/normal_6041973d7eed8.pdf
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5feb7cb8bb42d.pdf
    • http://volazanuva.22web.org/kokabuzegezag.pdf
    • http://electorat.org/coleman_powermate_pro-gen_5000_generator_manualtlcil.pdf
    • http://reduslim-buy.site/nalilefelugugubuvanxvxx.pdf
    • http://sun-italy.space/writing_and_solving_linear_equations_worksheetdevqx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/de130fd5-d268-4f12-8f39-1c44aaabb18a/el_hobbit_la_desolacin_de_smaug_elenco.pdf
    • http://dusilasazeli.rf.gd/rumozufawijezuro.pdf
    • http://rufukapujame.epizy.com/venanopaveka.pdf
    • https://fc9a8e44-b853-4378-b933-957c6fa9ceda.filesusr.com/ugd/1da781_a96af9541a7047b3982017082bf6fdf7.pdf?index=true
    • http://piwunutid.epizy.com/2020_calendar_with_karnataka_holidays.pdf
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_e7a02bdf9c6a4f3ca1fcdb40e6c37c27.pdf?index=true
    • http://notijopozij.epizy.com/number_line_addition_worksheets_grade_3.pdf
    • https://uploads.strikinglycdn.com/files/b4b1c33f-be09-4905-8543-6b87743633d6/251943500.pdf
    • http://mibexaluji.epizy.com/ligoxono.pdf
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_78d4a1e01c6845c4a9ea01b2526d71d0.pdf?index=true
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_87a3d84905ba495c87cacaaa8fd0327d.pdf?index=true
    • http://vigiwadovu.epizy.com/xudafaxapuvaxuwu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e183.bin
d0db8487047b38e40db2a4af04f8d64aa30bf4fb2b047e62f406a8ed8c4c7ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE183 5380 bytes
font_01_sfnt_off0000f39b.bin
e958332f02af94817029a9f9806a6173972be57f88cd4faace303605ef1f9f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 11332 bytes
font_02_sfnt_off000119dc.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119DC 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.